Photovoltaic frame, photovoltaic module and method for manufacturing photovoltaic frame

ABSTRACT

Disclosed are a photovoltaic frame and a photovoltaic module. The photovoltaic frame includes a top support portion, a bottom support portion, a transverse edge portion, a first side edge portion and a second side edge portion. The top support portion, the transverse edge portion and the second side edge portion enclose a holding slot, and the top support portion has a bearing surface facing the holding slot. The photovoltaic frame alternatively includes a third side edge portion configured to connect the top support portion and the bottom support portion. The photovoltaic frame further includes a weather-resistant protective layer, covering a part of outer surfaces, that are in contact with external environment, among the top support portion, the bottom support portion, the first side edge portion, the second side edge portion, the transverse edge portion, and the third side edge portion if included.

CROSS-REFERENCE TO RELATED APPLICATION

The present application is a continuation of U.S. patent applicationSer. No. 17/092,174, filed on Nov. 6, 2020, claiming the benefit ofpriority under the Paris Convention to Chinese Patent Application No.202011061500.8 filed Sep. 30, 2020, each of which is incorporated hereinby reference in its entirety.

TECHNICAL FIELD

The embodiments of the present disclosure relate to the field ofphotovoltaic module technology, in particular to a photovoltaic frame, aphotovoltaic module and a method for manufacturing the photovoltaicframe.

BACKGROUND

Generally, a frame is installed around a photovoltaic module, an edge ofa solar cell laminate is accommodated in a notch of the frame, and thephotovoltaic module is installed on a bracket through the frame. Theframe of the photovoltaic module plays a role in enhancing the strengthof the module and sealing the edge of the module.

At present, in order to adapt to the development of photovoltaicmodules, various photovoltaic frames have appeared. However, theexisting production process of photovoltaic frame is complicated andcostly, and the quality of the photovoltaic frame needs to be improved.Therefore, how to improve the quality of the photovoltaic frame whilemeeting the requirements of the shape and structure of the finishedproduct without adding too many process steps has become an urgentproblem to be solved in the design and manufacturing process ofphotovoltaic solar modules.

SUMMARY

Some embodiments of the present disclosure provide a photovoltaic frame,a photovoltaic module, and a method for manufacturing the photovoltaicframe, which can improve the stability of the photovoltaic frame whileincreasing production efficiency of the photovoltaic frame and reducingproduction cost.

In order to solve the above technical problems, an embodiment of thepresent disclosure provides a photovoltaic frame, including: a topsupport portion, a bottom support portion and a transverse edge portion,where the top support portion and the transverse edge portion enclose aholding slot, and the top support portion has a bearing surface facingthe holding slot, the bottom support portion is arranged opposite to thetop support portion, and the transverse edge portion is located at oneside of the top support portion away from the bottom support portion;and the photovoltaic frame is molded by a carbon steel sheet materialafter processing.

In some embodiments, the carbon steel sheet material contains a carbon,and a mass fraction of the carbon is in a range of 0.04% to 0.25%.

In some embodiments, the carbon steel sheet material further contains atleast one of silicon, manganese, phosphorus or sulfur, and a massfraction of the silicon is less than or equal to 0.5%, a mass fractionof the manganese is less than or equal to 0.6%, a mass fraction of thephosphorus is less than or equal to 0.1%, and a mass fraction of thesulfur is less than or equal to 0.045%.

In some embodiments, a strength of the carbon steel sheet material is ina range of 200 MPa to 600 MPa.

In addition, a percentage of breaking elongation of the carbon steelsheet material is within a range of 15% to 36%.

In some embodiments, the photovoltaic frame further includes: a firstside edge portion and a second side edge portion; the top supportportion, the second side edge portion and the transverse edge portionenclosing the holding slot; and the first side edge portion connectingthe top support portion and the bottom support portion.

In some embodiments, the photovoltaic frame further includes: a thirdside edge portion, the third side edge portion connecting the topsupport portion and the bottom support portion, and the third side edgeportion, the first side edge portion, the top support portion and thebottom support portion enclosing a closed cavity.

In some embodiments, the photovoltaic frame further includes: aweather-resistant protective layer covering at least an outer surface ofat least one of the top support portion, the bottom support portion, thefirst side edge portion, the second side edge portion or the transverseedge portion, where the weather-resistant protective layer includes analloy plating layer or an organic film layer.

In some embodiments, the weather-resistant protective layer furthercovers at least part of an inner wall surface of the closed cavity; theinner wall surface includes: a first surface, which is a surface of thefirst side edge portion facing the third side edge portion; a secondface, which is a surface of the third side edge portion facing the firstside edge portion; a third face, which is a surface of the top supportportion facing the bottom support portion; a fourth surface, which is asurface of the bottom support portion facing the top support portion;the weather-resistant protective layer covers only the first surface andthe second surface.

In some embodiments, the weather-resistant protective layer includes: afirst weather-resistant protective layer, covering an outer surface ofat least one of the top support portion, the bottom support portion, thefirst side edge portion, the second side edge portion or the transverseedge portion; a second weather-resistant protective layer, covering atleast part of the inner wall surface of the closed cavity, and athickness of the second weather-resistant protective layer is smallerthan a thickness of the first weather-resistant protective layer.

In some embodiments, the second side edge portion includes a first innersurface and a first outer surface which are opposite to each other, andthe first inner surface is an inner wall of the holding slot; thetransverse edge portion includes a second inner surface and a secondouter surface which are opposite to each other, and the second innersurface faces the top support portion; the top support portion includesa third inner surface and a third outer surface which are opposite toeach other, and the third inner surface faces the transverse edgeportion; the weather-resistant protective layer includes a firstprotective layer, covering the first inner surface, the second innersurface and the third inner surface; a second protective layer, coveringthe first outer surface, the second outer surface and the third outersurface, and a thickness of the second protective layer is greater thana thickness of the first protective layer.

In some embodiments, the photovoltaic frame further includes: a foaminglayer filled in the closed cavity, where a material of the foaming layeris an organic foaming material or an inorganic foaming material.

In some embodiments, the photovoltaic frame further includes: areinforcing rib located on the inner wall surface of the closed cavity.

In some embodiments, the photovoltaic frame is molded by the carbonsteel sheet material after processing, including: the photovoltaic frameis molded by extruding and stretching the carbon steel sheet material.

In some embodiments, the photovoltaic frame is molded by the carbonsteel sheet material after processing, including: the photovoltaic frameis molded by cold roll forming the carbon steel sheet material.

In some embodiments, the photovoltaic frame is molded by the carbonsteel sheet material after processing, including: the carbon steel sheetmaterial including a plurality of portions to be bent, and thephotovoltaic frame being molded by bending the portions to be bent ofthe carbon steel sheet material; the carbon steel sheet materialincluding a top surface and a bottom surface which are oppositelyarranged; the portion to be bent having at least one groove recessedfrom the top surface toward the bottom surface; an extending directionof each of the portions to be bent being a first direction; and anextending direction of a top opening of the groove being the same as thefirst direction.

In some embodiments, the portion to be bent has one groove, and thegroove extends from one end of the carbon steel sheet material to theother end along the first direction.

In some embodiments, the portion to be bent has a plurality of thegrooves, and the plurality of the grooves are arranged at intervalsalong the first direction.

In some embodiments, the carbon steel sheet material includes a firstside surface and a second side surface connecting the top surface andthe bottom surface, and the first side surface is opposite to the secondside surface; the groove at least includes a first groove, whichpenetrates through the first side surface; and the second groove, whichpenetrates through the second side surface.

In some embodiments, the photovoltaic frame further includes: a bendingportion, where the bending portion connects two adjacent connectionportions, and a plurality of the connection portions are sequentiallyconnected to form the top support portion, the bottom support portion,the first side edge portion, the second side edge portion and thetransverse edge portion; the bending portion includes two abutting sidesurfaces, and the bending portion and the plurality of the connectionportions are integrally formed.

In some embodiments, the two abutting side surfaces of the bendingportion are attached to each other; or, the two abutting side surfacesof the bending portion include: two contact surfaces which are attachedto each other; a connection surface connected with each of the contactsurfaces, with a gap between the two opposite connection surfaces.

In some embodiments, each of the connection portions is made of thecarbon steel sheet material of a single layer; or, at least two of theadjacent connection portions have an overlapping part, and theoverlapping part is composed of the carbon steel sheet material of atleast two layers.

In addition, the two abutting side surfaces of the bending portion arereinforced by a preset manner, and the preset manner includes any one ormore of a welding fixing, a riveting fixing or a mortise and tenonfixing.

In some embodiments, a thickness of the carbon steel sheet material isin a range of 0.2 mm to 2 mm.

In some embodiments, any one of a thickness of the top support portion,a thickness of the bottom support portion, a thickness of the first sideedge portion, a thickness of the second side edge portion and athickness of the transverse edge portion is a frame thickness, and aratio of the frame thickness to the thickness of the carbon steel sheetmaterial is in a range of 1 to 4.

In some embodiments, an included angle between any two adjacent ones ofthe top support portion, the bottom support portion, the first side edgeportion, the second side edge portion and the transverse edge portion isin a range of 20-160.

Accordingly, an embodiment of the present disclosure further provides aphotovoltaic module, including a stacked structure and the photovoltaicframe according to any of the above embodiments, where the stackedstructure includes a panel, a first adhesive film, a cell piece, asecond adhesive film and a backplane which are sequentially stacked.

In some embodiments, the backplane includes a glass or an organicbackplane.

In some embodiments, the panel includes a long side edge and a shortside edge adjacent to each other, where a length of the long side edgeis greater than or equal to 2 m, and a length of the short side edge isgreater than or equal to 1 m.

Accordingly, an embodiment of the present disclosure further provides amethod for manufacturing a photovoltaic frame, including: providing acarbon steel sheet material; forming the photovoltaic frame byprocessing and molding the carbon steel sheet material, the photovoltaicframe including: a top support portion, a bottom support portion, afirst side edge portion, a second side edge portion and a transverseedge portion, where the top support portion, the second side edgeportion, and the transverse edge portion enclose a holding slot, and thetop support portion has a bearing surface facing the holding slot, thebottom support portion is arranged opposite to the top support portion,and the transverse edge portion is located one side of the top supportportion away from the bottom support portion; the first side edgeportion connects the top support portion and the bottom support portion.

In some embodiments, the processing adopts a calendaring and cold rollforming process.

In some embodiments, the carbon steel sheet material includes aplurality of portions to be bent, the carbon steel sheet materialincludes a top surface and a bottom surface which are oppositelyarranged; the portions to be bent have at least one groove recessed fromthe top surface toward the bottom surface, an extending direction ofeach of the portions to be bent is a first direction, and an extendingdirection of a top opening of the groove is the same as the firstdirection; the processing includes: bending the portion to be bent toform the photovoltaic frame.

Compared with related technologies, the technical solution provided bythe embodiment of the present disclosure has the following advantages.

The photovoltaic frame is molded by selecting the carbon steel sheetmaterial after processing. Since the strength of the carbon steel sheetmaterial may reach more than three times the strength of the aluminummaterial, the structural strength of the photovoltaic frame is enhanced,thereby improving the stability of the photovoltaic frame. In addition,due to the high structural strength of the photovoltaic frame, thepresent disclosure does not need to set a height of the photovoltaicframe higher to adapt to a large-sized photovoltaic module, therebyeffectively reducing the thickness and weight of the photovoltaic frame,improving a production efficiency of the photovoltaic frame and reducinga production cost of the photovoltaic frame.

BRIEF DESCRIPTION OF THE DRAWINGS

One or more embodiments are described as examples with reference to thecorresponding figures in the accompanying drawings, and the examples donot constitute a limitation to the embodiments. Elements with the samereference numerals in the accompanying drawings represent similarelements. The figures in the accompanying drawings do not constitute aproportion limitation unless otherwise stated.

FIG. 1 is a sectional view of a photovoltaic frame provided according toa first embodiment of the present disclosure;

FIG. 2 is another sectional view of the photovoltaic frame providedaccording to the first embodiment of the present disclosure;

FIG. 3 is a sectional view of a photovoltaic frame provided according toa second embodiment of the present disclosure;

FIG. 4 is a sectional view of a photovoltaic frame with anotherstructure provided according to the second embodiment of the presentdisclosure;

FIG. 5 is a sectional view of a photovoltaic frame with anotherstructure provided according to the second embodiment of the presentdisclosure;

FIG. 6 is a sectional view of a photovoltaic frame with anotherstructure provided according to the second embodiment of the presentdisclosure;

FIG. 7 is a sectional view of a photovoltaic frame with anotherstructure provided according to the second embodiment of the presentdisclosure;

FIG. 8 is a sectional view of a photovoltaic frame provided according toa third embodiment of the present disclosure;

FIG. 9 is a sectional view of a photovoltaic frame provided according toa fourth embodiment of the present disclosure;

FIG. 10 is a sectional view of a photovoltaic frame provided accordingto a fifth embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram of a plate material providedaccording to a sixth embodiment of the present disclosure;

FIG. 12 is a first sectional view of a portion to be bent in FIG. 11along a first direction;

FIG. 13 is a second sectional view of the portion to be bent in FIG. 11along the first direction;

FIG. 14 is a third sectional view of the portion to be bent in FIG. 11along the first direction;

FIG. 15 is a fourth sectional view of the portion to be bent in FIG. 11along the first direction;

FIG. 16 is a fifth sectional view of the portion to be bent in FIG. 11along the first direction;

FIG. 17 is a sectional view of the portion to be bent in FIG. 11 along adirection perpendicular to the first direction;

FIG. 18 is a structural schematic diagram of a first photovoltaic frameprovided by a seventh embodiment;

FIG. 19 is a schematic structural diagram of a second photovoltaic frameprovided by the seventh embodiment;

FIG. 20 is a schematic structural diagram of a third photovoltaic frameprovided by the seventh embodiment;

FIG. 21 is a first enlarged view of a bending portion of thephotovoltaic frame provided by the seventh embodiment;

FIG. 22 is a second enlarged view of the bending portion of thephotovoltaic frame provided by the seventh embodiment;

FIG. 23 is a first side view of the photovoltaic frame provided by theseventh embodiment;

FIG. 24 is a second side view of the photovoltaic frame provided by theseventh embodiment;

FIG. 25 is a third side view of the photovoltaic frame provided by theseventh embodiment;

FIG. 26 is a flowchart of a method for manufacturing a photovoltaicframe provided by an eighth embodiment;

FIG. 27 is a schematic structural diagram corresponding to each step ofthe method for manufacturing the photovoltaic frame provided by theeighth embodiment;

FIG. 28 is a schematic diagram of a partial three-dimensional structureof a photovoltaic module provided by an embodiment of the presentdisclosure;

FIG. 29 is a sectional structural diagram of a stacked structure in FIG.28 ;

FIG. 30 is another sectional structural diagram of the stacked structurein FIG. 28 .

DETAILED DESCRIPTION

According to the background technology, the production efficiency of aphotovoltaic frame is low and the cost is high.

Through an analysis, it is found that the main reasons include: thestrength of the existing aluminum frame is limited. Throughout thedevelopment history of photovoltaic modules, the size of thephotovoltaic module has changed from 250*175*25 mm to the current1950*995*45 mm. That is to say, the size of the photovoltaic module isconstantly increasing, and will develop towards larger size in thefuture. However, with the increasing size of the photovoltaic module,the size of an aluminum photovoltaic module frame is developing towardsthe direction of a larger frame section and thicker thickness. Theessential reason for this phenomenon is the low strength of the aluminummaterial itself. When the module size is increased, using an aluminumalloy material to make a section steel, the frame section of the moduleneeds to be reinforced by a structure with larger section and thickerthickness, which may increase the use cost.

To solve the above problems, the present disclosure provides aphotovoltaic frame, a photovoltaic module and a method for manufacturingthe photovoltaic frame. The photovoltaic frame in an embodiment of thepresent disclosure is molded by a carbon steel sheet material afterprocessing. The photovoltaic frame manufactured from the above sheetmaterial can improve a production efficiency of the photovoltaic frameand reduce a production cost, while improving the stability of thephotovoltaic frame, which facilitates the production and supply of awhole industrial chain.

The embodiments of the present disclosure will be described in detailbelow with reference to the accompanying drawings in order to make theobjectives, technical solutions and advantages of the present disclosureclearer. However, it will be apparent to those skilled in the art that,in the various embodiments of the present disclosure, numerous technicaldetails are set forth in order to provide the reader with a betterunderstanding of the present disclosure. However, the technicalsolutions claimed in the present disclosure may be implemented withoutthese technical details and various changes and modifications based onthe following embodiments.

A first embodiment of the present disclosure relates to a photovoltaicframe. A specific structure is shown in FIG. 1 , and includes: a topsupport portion 1, a bottom support portion 2, and a transverse edgeportion 5; the top support portion 1 and the transverse edge portion 5enclose a holding slot 10, and the top support portion 1 has a bearingsurface 101 facing the holding slot 10, the bottom support portion 2 isarranged opposite to the top support portion 1, and the transverse edgeportion 5 is located at one side of the top support portion 1 away fromthe bottom support portion 2. The photovoltaic frame is molded by acarbon steel sheet material after processing.

Specifically, as shown in FIG. 1 , the photovoltaic frame furtherincludes: a first side edge portion 3, a second side edge portion 4, anda third side edge portion 7; the top support portion 1, the second sideedge portion 4 and the transverse edge portion 5 enclose the aboveholding slot 10; the first side edge portion 3 connects the top supportportion 1 and the bottom support portion 2; the third side edge portion7 connects the top support portion 1 and the bottom support portion 2;and the third side edge portion 7, the first side edge portion 3, thetop support portion 1 and the bottom support portion 2 enclose a closedcavity 20. For convenience of marking and distinguishing, adjacentstructures are separated by dotted lines in FIG. 1 , and the dottedlines are not illustrated in subsequent figures.

As shown in FIG. 1 , the bottom support portion 2 and the top supportportion 1 have the same length. The photovoltaic frame is a photovoltaicframe without a C-edge.

Please refer to FIG. 2 , which is another sectional view of thephotovoltaic frame of this embodiment. The photovoltaic frame furtherincludes a third side edge portion 7. The third side edge portion 7connects the top support portion 1 and the bottom support portion 2, andthe third side edge portion 7 is connected with one side edge of thebottom support portion 2. A joint between the first side edge portion 3and the bottom support portion 2 is spaced from the other side edge ofthe bottom support portion 2. Specifically, the photovoltaic frame shownin FIG. 2 is a photovoltaic frame with a C-edge (as shown in FIG. 2 ,the length of the bottom support portion 2 is greater than the length ofthe top support portion 1), and the photovoltaic frame shown in FIG. 1is a photovoltaic frame without a C-edge. The structure of thephotovoltaic frame is not specifically limited in this embodiment, andthe photovoltaic frames with different structures may be designedaccording to actual needs, only by ensuring that the photovoltaic frameis molded by the carbon steel sheet material after processing.

It should be noted that, in other embodiments, the photovoltaic framemay also be an S-shaped frame, that is, the photovoltaic frame may notneed to be provided with the above-described third side edge portion.

It is worth mentioning that the carbon steel sheet material in thisembodiment contains carbon, and a mass fraction of the carbon is in arange of 0.04% to 0.25%. Since too low carbon content in the carbonsteel sheet material may lead to a weak strength of the carbon steelsheet material, which is difficult to meet the structural strengthrequirements of the photovoltaic frame. The excessive carbon content inthe carbon steel sheet material may lead to an increase in a salt spraycorrosion rate of the carbon steel sheet material, which is difficult tomeet the requirement of a warranty period of the photovoltaic frame. Byusing the carbon steel sheet material with this carbon content range tomanufacture the photovoltaic frame, the strength of the photovoltaicframe may meet the design requirements without affecting the warrantyperiod of the photovoltaic frame. The mass fraction of the carboncontent in the carbon steel sheet material in this embodiment ispreferably 0.12% or 0.13%. Using the carbon steel sheet material withsuch a carbon content value to manufacture the photovoltaic frame maymake the photovoltaic frame have stronger strength and longer warrantyperiod.

In addition, the carbon steel sheet material may further contain atleast one of silicon, manganese, phosphorus or sulfur, and a massfraction of the silicon is less than or equal to 0.5%, a mass fractionof the manganese is less than or equal to 0.6%, a mass fraction of thephosphorus is less than or equal to 0.1%, and a mass fraction of thesulfur is less than or equal to 0.045%.

Specifically, the carbon steel sheet material has a small amount ofsulfur element or phosphorus element, which may enhance the strength andhardness of the carbon steel sheet material, and improve the formabilityand processing property of the carbon steel sheet material, such as acold roll forming formability, a bending property or a cuttingprocessing property of the carbon steel sheet material. If the contentof the sulfur element or the phosphorus element is too high, a toughnessof the carbon steel sheet material may be reduced correspondingly, whicheasily leads to a problem of brittle fracture. Therefore, the massfraction of the phosphorus is less than or equal to 0.1%, such as 0.01%,0.05% and 0.08%; the mass fraction of the sulfur is less than or equalto 0.045%, such as 0.015%, 0.02% and 0.04%. By doping the phosphorus orthe sulfur with the above content, the strength and hardness of thecarbon steel sheet material are improved, while preventing the toughnessof the carbon steel sheet material from being too low. Adding amanganese element or a silicon element as a deoxidizer in the process ofmanufacturing the carbon steel sheet material may reduce an iron oxideinto an iron and prevent the carbon steel sheet material from becomingbrittle. In addition, a proper amount of the manganese element or thesilicon element may bring a solid solution strengthening effect. Thesolid solution strengthening refers to a phenomenon that the strengthand hardness of a pure metal are improved after proper alloying. Thesolid solution strengthening may improve the strength and hardness ofthe carbon steel sheet material, which makes the property of the carbonsteel sheet material better, and is more conductive to improving a coldroll forming or a grooving and bending forming to make a photovoltaicframe with excellent property, thus further avoiding problems such asthe fracture in the forming process. If the content of the manganeseelement or the silicon element is too high, a corrosion resistance and awelding property of the carbon steel sheet material may be weakened.Therefore, in this embodiment, the mass fraction of the silicon is lessthan or equal to 0.5%, such as 0.1%, 0.25%, and 0.4%. The mass fractionof the manganese is less than or equal to 0.6%, such as 0.01%, 0.4% and0.5%. By doping the silicon or the manganese with the above content, inaddition to ensuring that the carbon steel sheet material has goodstrength and hardness characteristics, the carbon steel sheet materialalso has good corrosion resistance and welding property.

It should be noted that the aforementioned mass fraction refers to aratio of a relative atomic mass (need to multiply a coefficient) of eachatom in a compound to a total formula weight, that is, a proportion ofan element in a certain substance. For example, the mass fraction of thecarbon refers to a proportion of the carbon element in the carbon steelsheet material.

Preferably, the strength of the carbon steel sheet material is in arange of 200 MPa to 600 MPa. The strength of the carbon steel sheetmaterial represents a mechanical property of the carbon steel sheetmaterial against fracture and excessive deformation. By adopting thecarbon steel sheet material with such strength range, the manufacturedphotovoltaic frame may meet the design requirements and is not easy todeform under an action of an external force, which improves thestability of the photovoltaic frame. The strength of the carbon steelsheet material in this embodiment is preferably 300 MPa or 400 MPa. Thephotovoltaic frame manufactured by the carbon steel sheet material withsuch strength may make the photovoltaic frame more stable.

More preferably, a percentage of breaking elongation of the carbon steelsheet material is within a range of 15% to 36%. When the carbon steelsheet material is subjected to the external force to break, a ratio ofan elongation length after stretching to a length before stretching isthe percentage of breaking elongation of the carbon steel sheetmaterial. By adopting the carbon steel sheet material with suchpercentage of breaking elongation range, the manufactured photovoltaicframe may meet the design requirements, has a certain deformationcapability, and does not break after a slight deformation, whichimproves the stability of the photovoltaic frame. The percentage ofbreaking elongation of the carbon steel sheet material in thisembodiment is preferably 25% or 26%. The photovoltaic frame manufacturedby the carbon steel sheet material with such percentage of breakingelongation may make the photovoltaic frame more stable.

Compared with related technologies, the photovoltaic frame is molded byselecting the carbon steel sheet material after processing. Since thestrength of the carbon steel sheet material may reach more than threetimes the strength of the aluminum material, the structural strength ofthe photovoltaic frame is enhanced, thereby improving the stability ofthe photovoltaic frame. In addition, due to the high structural strengthof the photovoltaic frame, the present disclosure does not need to set aheight of the photovoltaic frame higher to adapt to a large-sizedphotovoltaic module, thereby effectively reducing the thickness andweight of the photovoltaic frame, improving a production efficiency ofthe photovoltaic frame and reducing a production cost of thephotovoltaic frame.

It should be noted that a thickness of the carbon steel sheet materialin this embodiment is in a range of 0.2 mm to 2 mm. The carbon steelsheet material with such a thickness range may reduce the productioncost of the photovoltaic frame while ensuring the strength of thephotovoltaic frame. The thickness of the carbon steel sheet material inthis embodiment is preferably 0.6-1 mm. Adopting the carbon steel sheetmaterial with such thickness to manufacture the photovoltaic frame mayreduce the production cost of the photovoltaic frame as much as possiblewhile ensuring the strength of the photovoltaic frame.

It is worth mentioning that any one of a thickness of the top supportportion 1, a thickness of the bottom support portion 2, a thickness ofthe first side edge portion 3, a thickness of the second side edgeportion 4 and a thickness of the transverse edge portion 5 is a framethickness, and a ratio of the frame thickness to the thickness of thecarbon steel sheet material is in a range of 1 to 4. That is to say,after the photovoltaic frame is molded in this embodiment, the thicknessof the frame is not limited to the same everywhere. The carbon steelsheet material may be folded and extruded by calendaring, so that theratio of the thickness of the top support portion 1, the bottom supportportion 2, the first side edge portion 3, the second side edge portion 4and the transverse edge portion 5 to the thickness of the carbon steelsheet material is in the range of 1 to 4. With the arrangement of suchstructure, the shape and structure of the photovoltaic frame arediversified, which may meet various design requirements. It should benoted that, in practical applications, the specific structure of thephotovoltaic frame is not limited to only having the top support portion1, the bottom support portion 2, the first side edge portion 3, thesecond side edge portion 4 and the transverse edge portion 5, but mayalso have other structures. When the photovoltaic frame has otherstructures, the ratio of the frame thickness of the structure to thethickness of the carbon steel sheet material is also in the range of 1to 4.

Specifically, an included angle between any two adjacent ones of the topsupport portion 1, the bottom support portion 2, the first side edgeportion 3, the second side edge portion 4 and the transverse edgeportion 5 is in a range of 20-160 degree. With the arrangement of suchstructure, the shape and structure of the photovoltaic frame arediversified, which may meet various design requirements.

It may be understood that the photovoltaic frame in this embodiment ismolded by the carbon steel sheet material after processing.Specifically, the photovoltaic frame is molded by extruding andstretching the carbon steel sheet material. In this way, themanufacturing process of the photovoltaic frame is simple, the cost islow, and there is no pollution in the manufacturing process.Specifically, the photovoltaic frame is molded by cold roll forming thecarbon steel sheet material. The cold roll forming process is tomechanically bend the carbon steel sheet material into a profile with acertain shape and size at room temperature. The advantages of the coldroll forming are: it may produce all kinds of extremely thin, extremelywide and complex profiles that may not be produced by rolling; it savesmetal materials; the mechanical property of the products is good.Commonly used cold roll forming processing methods include a rollbending, a press bending, a drawing bending and a bending.

A second embodiment of the present disclosure relates to a photovoltaicframe, and this embodiment is further improved on the basis of the firstembodiment. The specific improvement lies in that the photovoltaic framein this embodiment further includes a weather-resistant protectivelayer, which at least covers an outer surface of at least one of a topsupport portion, a bottom support portion, a first side edge portion, asecond side edge portion or a transverse edge portion, so as to furtherimprove the reliability of the photovoltaic frame.

Please refer to FIG. 3 , which is a schematic structural diagram of thephotovoltaic frame. A weather-resistant protective layer 6 covers theouter surfaces of a top support portion 1, a bottom support portion 2, afirst side edge portion 3, a second side edge portion 4 and a transverseedge portion 5. The weather-resistant protective layer 6 includes analloy plating layer or an organic film layer. Through an arrangementwith such structure, a carbon steel may be prevented from contacting anexternal environment, so that the photovoltaic frame is difficult to becorroded by external water, oxygen or other substances, a service lifeof the photovoltaic frame is prolonged, and the problems of easycorrosion and short service life of the carbon steel sheet material arefundamentally solved.

It should be noted that the outer surfaces of the top support portion 1,the bottom support portion 2, the first side edge portion 3, the secondside edge portion 4 and the transverse edge portion 5 shown in FIG. 3are all covered by the weather-resistant protective layer 6. Inpractical applications, the weather-resistant protective layer 6 mayonly cover the outer surfaces which are in contact with the externalenvironment among the top support portion 1, the bottom support portion2, the first side edge portion 3, the second side edge portion 4 and thetransverse edge portion 5 (for example, it may only cover the topsupport portion 1, the bottom support portion 2 and the transverse edgeportion 5), so as to reduce the production cost of the photovoltaicframe while ensuring that the photovoltaic frame is difficult to becorroded by external water, oxygen or other substances and the servicelife of the photovoltaic frame is prolonged.

It is worth mentioning that, as shown in FIGS. 4-7 , a position andthickness of the weather-resistant protective layer 6 in this embodimentmay be set according to actual requirements, so as to obtain aphotovoltaic frame that meets the requirements. For the convenience ofunderstanding, the photovoltaic frames shown in FIGS. 4-7 arespecifically described below.

Please refer to FIG. 4 , which is a sectional view of a photovoltaicframe in a feasible embodiment. The photovoltaic frame further includesa third side edge portion 7, which connects the top support portion 1and the bottom support portion 2. The third side edge portion 7, thefirst side edge portion 3, the top support portion 1 and the bottomsupport portion 2 enclose a closed cavity 20. The weather-resistantprotective layer 6 further covers an inner wall surface of the closedcavity 20.

Since the photovoltaic frame is usually of a hollow structure, that is,the closed cavity 20 is also in contact with the external environment.By covering the inner wall surface of the closed cavity 20 with theweather-resistant protective layer 6, the inner wall surface of theclosed cavity 20 may not be corroded by external water, oxygen or othersubstances, thus further prolonging a service life of the photovoltaicframe.

It can be understood that in the photovoltaic frame shown in FIG. 4 ,the weather-resistant protective layer 6 covers all the inner wallsurfaces 201 of the closed cavity 20. However, in practicalapplications, the weather-resistant protective layer 6 may only coversome inner wall surfaces 201 of the closed cavity 20. The specificstructure is shown in FIG. 5 .

Referring to FIG. 5 , the inner wall surface 201 includes: a firstsurface 201A, which is a surface of the first side edge portion 3 facingthe third side edge portion 7; a second surface 201B, which is a surfaceof the third side edge portion 7 facing the first side edge portion 3; athird surface 201C, which is a surface of the top support portion 1facing the bottom support portion 2; and a fourth surface 201D, which isa surface of the bottom support portion 2 facing the top support portion1. The weather-resistant protective layer 6 covers only the firstsurface 201A and the second surface 201B.

Generally speaking, a surface area of the first surface 201A and thesecond surface 201B of the photovoltaic frame is larger than that of thethird surface 201C and the fourth surface 201D, resulting in that thefirst surface 201A and the second surface 201B have a larger contactsurface with the external environment, and are more vulnerable to becorroded by external water, oxygen or other substances. The weatherresistant protective layer 6 is set to only cover the first side 201Aand the second side 201B, so that the production cost of thephotovoltaic frame is reduced while ensuring that the inner wall surface201 is difficult to be corroded by external water, oxygen or othersubstances, and the service life of the photovoltaic frame is prolonged.

Referring to FIG. 6 , the weather-resistant protective layer 6 includesa first weather-resistant protective layer 61 covering an outer surfaceof the top support portion 1, the bottom support portion 2, the firstside edge portion 3, the second side edge portion 4 or the transverseedge portion 5; a second weather-resistant protective layer 62 coveringthe inner wall surface 201 of the closed cavity 20, and a thickness ofthe second weather-resistant protective layer 62 is smaller than athickness of the first weather-resistant protective layer 61. Comparedwith the inner wall surface 201, the outer surface of the photovoltaicframe is more easily to be corroded by external water, oxygen or othersubstances, and the thicker the weather-resistant protective layer 6 is,the stronger its protection ability will be, but the production cost ofthe weather-resistant protective layer 6 may be higher. Therefore, anarrangement with such structure may ensure that the outer surface andthe inner wall surface 201 of the photovoltaic frame are not corroded byexternal water, oxygen or other substances, while further reducing theproduction cost of the photovoltaic frame.

It can be understood that the outer surfaces of the top support portion1, the bottom support portion 2, the first side edge portion 3, thesecond side edge portion 4 and the transverse edge portion 5 shown inFIG. 6 are all covered by the weather-resistant protective layer 6. Inpractical applications, the weather-resistant protective layer 6 mayonly cover the outer surfaces which are in contact with the externalenvironment among the top support portion 1, the bottom support portion2, the first side edge portion 3, the second side edge portion 4 and thetransverse edge portion 5. The weather-resistant protective layer 6shown in FIG. 6 also covers all the inner wall surfaces 201 of theclosed cavity 20, but in practical applications, the weather-resistantprotective layer 6 may only cover some inner wall surfaces 201 of theclosed cavity 20.

It is worth mentioning that a grammage of the first weather-resistantprotective layer 61 in this embodiment is in a range of 20 g/m² to 500g/m². In this way, the production cost of the first weather-resistantprotective layer 61 may be effectively controlled while ensuring thatthe first weather-resistant protective layer 61 may isolate the externalwater, oxygen or other substances, and the property of the photovoltaicframe may not be affected due to the excessive thickness of the firstweather-resistant protective layer 61. Preferably, the grammage of thefirst weather-resistant protective layer 61 is 260 g/m² or 900 g/m². Thefirst weather-resistant protective layer 61 in this grammage range mayensure that the first weather-resistant protective layer 61 isolates theexternal water, oxygen or other substances while reducing the productioncost of the first weather-resistant protective layer 61 as much aspossible.

In this embodiment, a grammage of the second weather-resistantprotective layer 62 is in a range of 0 g/m² to 500 g/m². In this way,the production cost of the second weather-resistant protective layer 62may be effectively controlled while ensuring that the secondweather-resistant protective layer 62 may isolate the external water,oxygen or other substances. Preferably, the grammage of the secondweather-resistant protective layer 62 is 240 g/m² or 250 g/m². Thesecond weather-resistant protective layer 62 in this grammage range mayensure that the second weather-resistant protective layer 62 isolatesthe external water, oxygen or other substances while reducing theproduction cost of the second weather-resistant protective layer 62 asmuch as possible, without making the thickness of the secondweather-resistant protective layer 62 exceed the thickness of the firstweather-resistant protective layer 61.

Referring to FIG. 7 , the second side edge portion 4 includes a firstinner surface 41 and a first outer surface 42 which are opposite to eachother, and the first inner surface 41 is an inner wall of the holdingslot 10. The transverse edge portion 5 includes a second inner surface51 and a second outer surface 52 which are opposite to each other, andthe second inner surface 51 faces the top support portion 1. The topsupport portion 1 includes a third inner surface 11 and a third outersurface 12 which are opposite to each other, and the third inner surface11 faces the transverse edge portion 5. The weather-resistant protectivelayer 6 includes a first protective layer 601 covering the first innersurface 41, the second inner surface 51 and the third inner surface 11;a second protective layer 602 covering the first outer surface 42, thesecond outer surface 52 and the third outer surface 12, and a thicknessof the second protective layer 602 is greater than a thickness of thefirst protective layer 601. Since the holding slot 10 is usually used tohold a photovoltaic module, that is, the inner wall of the holding slot10 may contact with the photovoltaic module, which may cause the secondprotective layer 602 provided on the inner wall of the holding slot 10to be worn, thus causing the function of the second protective layer 602to be affected. Through an arrangement with such structure, the secondprotective layer 602 may still play its due protective function (i.e.,isolate the external water, oxygen or other substances from contactingthe inner wall of the holding slot 10) even if it is worn aftercontacting with the photovoltaic modules, thereby further improving thereliability of the photovoltaic frame.

With reference to FIGS. 4 to 7 , the weather-resistant protective layer6 is an alloy plating layer, and the material of the alloy plating layerincludes any one or more of galvanization, galvanized aluminum orgalvanized magnesium aluminum. In addition, the weather-resistantprotective layer 6 of this embodiment may also be an organic film layer,and the material of the organic film layer includes any one or more ofpolyethylene, polyvinylidene fluoride, polyurethane, polyvinyl chlorideor silane-modified polymer.

A third embodiment of the present disclosure relates to a photovoltaicframe, and this embodiment is further improved on the basis of the firstembodiment. The specific improvement lies in that the photovoltaic framefurther has a closed cavity 20, and the closed cavity 20 is filled witha foaming layer 20A to further improve the stability of the photovoltaicframe.

Referring to FIG. 8 , the photovoltaic frame includes a third side edgeportion 7, which connects a top support portion 1 and a bottom supportportion 2, and the third side edge portion 7, a first side edge portion3, the top support portion 1 and the bottom support portion 2 enclosethe closed cavity 20; the foaming layer 20A is filled in the closedcavity 20. The foaming layer 20A with a high strength and a goodadhesion is arranged in the closed cavity 20, so that the foaming layer20A and the photovoltaic frame made of a carbon steel bear a forcetogether, thereby further enhancing a yield strength of the photovoltaicframe.

Herein, the material of the foaming layer 20A is an organic foamingmaterial or an inorganic foaming material, preferably made of a rigidpolyurethane foaming plastic or an unsaturated polyester plastic. Theunsaturated polyester plastic includes a component A and a component B,where the component A includes an unsaturated polyester resin, athickener, an initiator and a filler, and the component B is a glassfiber coarse sand or a glass fiber mat.

Specifically, the polyurethane foaming plastic in the presentdisclosure, referred to as a rigid polyurethane foam for short, hasexcellent properties such as a light weight, a high strength, a gooddimensional stability, a strong adhesive force, and has a good adhesivestrength to metals such as steel, aluminum and stainless steel, and mostplastic materials such as wood, concrete and asphalt, etc. Moreover,since a closed cell rate of the rigid polyurethane is more than 95%,which belongs to a hydrophobic material, the photovoltaic frame in thisembodiment has moisture-proof and waterproof properties. Furthermore,the polyurethane is a kind of flame-retardant self-extinguishingmaterial after adding a flame retardant, and its softening point mayreach above 250° C., so that the photovoltaic frame in this embodimenthas properties of fireproof, flame retardant and high-temperatureresistance.

It is worth mentioning that a ratio of a volume of the foaming layer 20Ato a volume of the closed cavity 20 shown in FIG. 8 is almost equal to100%, that is, the foaming layer 20A fills the closed cavity 20.However, in practical applications, the foaming layer 20A may not fillthe closed cavity 20, and the ratio of the volume of the foaming layer20A to the volume of the closed cavity 20 is in a range of 60% to 100%.In this way, a yield strength of the photovoltaic frame may be improvedwhile the production cost of the photovoltaic frame may be reduced.Preferably, the ratio of the volume of the foaming layer 20A to thevolume of the closed cavity 20 is 80% or 85%. With the foaming layer 20Awith such a volume ratio in the closed cavity 20, the photovoltaic framehas higher yield strength and lower production cost.

A fourth embodiment of the present disclosure relates to a photovoltaicframe, and this embodiment is further improved on the basis of the firstembodiment. The specific improvement lies in that the photovoltaic framefurther has a closed cavity 20 and a reinforcing rib 20B. Thereinforcing rib 20B is located on an inner wall surface of the closedcavity 20 to further improve the stability of the photovoltaic frame.

Referring to FIG. 9 , the reinforcing rib 20B includes: a firstreinforcing rib 20B1 and a second reinforcing ribs 20B2. The firstreinforcing rib 20B1 connects a first vertex angle and a second vertexangle, where the first vertex angle is an included angle between a firstside edge portion 3 and a top support portion 1, and the second vertexangle is an included angle between a third side edge portion 7 and abottom support portion 2; The second reinforcing ribs 20B2 connects athird vertex angle and a fourth vertex angle, where the third vertexangle is an included angle between the first side edge portion 3 and thebottom support portion 2, and the fourth vertex angle is an includedangle between the third side edge portion 7 and the bottom supportportion 2. By providing the “X”-shaped reinforcing rib 20B, a strengthof the photovoltaic frame may be further strengthened, and the hollowclosed cavity 20 may be prevented from being deformed under an action ofan external force.

It is worth mentioning that the number and setting position of thereinforcing rib 20B in this embodiment are not limited to this. Thepositions and numbers of other reinforcing ribs 20B which are arrangedin the closed cavity 20 and may increase the strength of the closedcavity 20 may be set according to the actual needs, which are all withinthe protection scope of the present disclosure.

A fifth embodiment of the present disclosure relates to a photovoltaicframe, and this embodiment is further improved on the basis of the firstembodiment. The specific improvement lies in that the photovoltaic framefurther has a closed cavity 20 and a protrusion 20C. The protrusion 20Cis located on an inner wall surface 201 of the closed cavity 20 tofurther enhance a strength of the photovoltaic frame.

Referring to FIG. 10 , the protrusion 20C includes: a first protrusion20C1 and a second protrusion 20C2; the first protrusion 20C1 is providedon a surface of a first side edge portion 3 facing the third side edgeportion 7; the second protrusion 20C2 is provided on a surface of athird side edge portion 7 facing the first side edge portion 3. It canbe understood that the protrusion 20C shown in FIG. 9 is only providedon the surface of the first side edge portion 3 facing the third sideedge portion 7, and the surface of the third side edge portion 7 facingthe first side edge portion 3. In practical applications, the settingposition of the protrusion 20C is not limited to this, and may also beprovided on all other surfaces of the closed cavity, which is notspecifically limited in this embodiment.

Preferably, a plurality of the first protrusions 20C1 are arranged atintervals on the surface of the first side edge portion 3 facing thethird side edge portion 7; and a plurality of the second protrusions arearranged at intervals on the surface of the third side edge portion 7facing the first side edge portion 1. Through an arrangement with suchstructure, the first side edge portion 3 and/or the third side edge 7may be stressed evenly, thus further improving the stability of thephotovoltaic frame.

More preferably, the number of the first protrusions 20C1 is the same asthe number of the second protrusions 20C2. Through an arrangement withsuch structure, the two sides of the photovoltaic frame are stressedevenly, thus further improving the stability of the photovoltaic frame.

A sixth embodiment of the present disclosure relates to a carbon steelsheet material, and this embodiment is a further improvement of thefirst embodiment. The specific improvement lies in that in thisembodiment, the carbon steel sheet material includes a plurality ofportions to be bent 80, and a photovoltaic frame is molded by bendingthe portions to be bent 80 of the carbon steel sheet material. In thisway, a production efficiency of the photovoltaic frame may be improvedand a production process of the photovoltaic frame may be simplified.

Referring to FIG. 11 to FIG. 17 , in this embodiment, the carbon steelsheet material includes a top surface 81 and a bottom surface 82 whichare oppositely arranged. The portion to be bent 80 has at least onegroove 83 recessed from the top surface 81 toward the bottom surface 82.An extending direction of each of the portions to be bent 80 is a firstdirection, and an extending direction of a top opening of the groove 83is the same as the first direction.

The following will be described in detail with reference to theaccompanying drawings.

Please refer to FIG. 11 , which is a partial three-dimensionalstructural diagram of the carbon steel sheet material. The material ofthe carbon steel sheet material is a steel profile. The steel profile isa carbon steel, and a hardness of the steel profile varies with a carboncontent.

The carbon steel sheet material includes a plurality of portions to bebent 80. In the process of forming the photovoltaic frame, the carbonsteel sheet material is bent along the portions to be bent 80. Thenumber of the portions to be bent 80 in the carbon steel sheet materialmay be set according to a specific structure of the photovoltaic frame,and a distance between adjacent portions to be bent 80 may be setaccording to a length of each edge of the photovoltaic frame.

Referring to FIG. 11 and FIG. 12 , FIG. 12 is a first sectional view ofthe portion to be bent 80 in FIG. 11 along the first direction. In oneexample, the portion to be bent 80 has a groove 83 extending from oneend to the other end of the carbon steel sheet material in the firstdirection. That is, one portion to be bent 80 corresponds to one groove83, and the groove 83 crosses the carbon steel sheet material, that is,a length of the top opening of the groove 83 is the same as a width ofthe carbon steel sheet material along the first direction.

The groove 83 occupies a large space in the portion to be bent 80, sothat the carbon steel sheet material is easier to be bent into shape.For the carbon steel sheet material of a hard material such as the steelprofile, it is suitable to adopt the groove 83 across both ends of thecarbon steel sheet material.

A bottom of the groove 83 is located in the portion to be bent 80, and aratio of a depth c of the groove 83 to a thickness f of the carbon steelsheet material between the adjacent portions to be bent 80 is in a rangeof 0.2-0.6, such as 0.3 or 0.5. When the ratio is within the range, itmay not only ensure that the portion to be bent 80 has a certainstrength, avoid a fracture of the carbon steel sheet material, but alsoensure that the portion to be bent 80 is easy to bend.

In addition, it can be understood that a single groove 83 across thecarbon steel sheet material shall not penetrate through the top surface81 and the bottom surface 82 of the carbon steel sheet material;otherwise the carbon steel sheet material is no longer integrallyformed.

A thickness e of the portion to be bent 80 directly opposite to thegroove 83 is in a range of 1.2-4 mm. If the thickness e is too large, itwill easily lead to a problem of inability to bend; and if the thicknesse is too small, it will easily lead to a problem of breakage. Theportion to be bent 80 within the above thickness range has both goodstrength and toughness, which may avoid the above two problems.

Referring to FIG. 13 , FIG. 13 is a second sectional view of the portionto be bent 80 in FIG. 11 along the first direction. In another example,the portion to be bent 80 has a groove 83, but the groove 83 does notcross the carbon steel sheet material, that is, there is no opening atboth ends of the carbon steel sheet material along the first direction.In this way, the fracture of the carbon steel sheet material caused byan excessive bending angle or an excessive bending force may be avoided.

With reference to FIGS. 11 and 14 to 16 , FIGS. 14 to 16 are fourdifferent sectional views of the upper portion to be bent 80 in FIG. 11along the first direction. Specifically, the portion to be bent 80 hasat least two grooves 83 arranged at intervals, and an arrangementdirection of the grooves 83 arranged at intervals is the same as thefirst direction. Since a plurality of the grooves 83 are arrangedadjacent to each other, the carbon steel sheet material between theadjacent grooves 83 still has enough thickness, which may ensure thatthe portion to be bent 80 has a high strength and prevent the portion tobe bent 80 from breaking.

In addition, in the first direction, a length b of the top opening ofthe groove 83 is smaller than a distance a between the adjacent grooves83. Since the carbon steel sheet material between the adjacent grooves83 has high strength, when the distance a between the adjacent grooves83 is large, the portion to be bent 80 may be ensured to have highstrength. Specifically, when a width of the carbon steel sheet materialalong the first direction is within a range of 20 mm-400 mm, one groove83 and the carbon steel sheet material between the grooves 83 serve asone group of a unit structure. There are N groups of the unit structuresfor one portion to be bent 80, and (a+b)*N is the same as the width ofthe carbon steel sheet material along the first direction, where a/b isless than 100% and n is 2-20. For example, N may be 2.5 (that is, havingtwo groups of the unit structures and one groove 83 in a group of theunit structure or the carbon steel sheet material between the grooves83), 5, 10, etc.

The technical solution for the portion to be bent 80 having at least twogrooves 83 arranged at intervals includes the following specificexamples:

In Example one, referring to FIGS. 11 and 14 , the carbon steel sheetmaterial further includes a first side surface 801 and a second sidesurface 802 both for connecting the top surface 81 and the bottomsurface 82, and the first side surface 801 is opposite to the secondside surface 802. The groove 83 at least includes: a first groove 831,which penetrates through the first side surface 801; a second groove832, which penetrates through the second side surface 802. In this way,when the portion to be bent 80 is bent, both ends of the portion to bebent 80 may maintain a good flatness and improve the aesthetics.

In addition, the bottom of the groove 83 is located in the portion to bebent 80, and the ratio of the depth c of the groove 83 to the thicknessf of the carbon steel sheet material between the adjacent portions to bebent 80 is in a range of 0.5-1. Compared with the groove 83 across thecarbon steel sheet material, the ratio of the depth c of the grooves 83arranged at intervals to the thickness f of the carbon steel sheetmaterial between the adjacent portions to be bent 80 is larger. The mainreason for this design is that the carbon steel sheet material betweenthe grooves 83 arranged at intervals has high strength and is not easyto bend. If the ratio of the depth of the groove 83 to the thickness fof the carbon steel sheet material between the adjacent portions to bebent 80 is less than 0.5, the whole portion to be bent 80 is difficultto be bent. Therefore, the groove 83 is correspondingly deepened, thenthe thickness of the portion to be bent 80 corresponding to the groove83 becomes smaller, which may make the whole portion to be bent 80 bebent more easily.

In Example two, referring to FIGS. 11 and 15 , the groove 83 does notpenetrate through the first side surface 801 and the second side surface802.

In Example three, referring to FIGS. 11 and 16 , the groove 83penetrates through the top surface 81 and the bottom surface 82 of theportion to be bent 80. Since the ratio between the depth of the groove83 and the thickness of the carbon steel sheet material does not need tobe considered, the process difficulty is reduced.

Referring to FIGS. 11 and 17 , FIG. 17 is a sectional structural diagramof the portion to be bent 80 in FIG. 11 along a direction perpendicularto the first direction. On a cross section perpendicular to the firstdirection, a cross section shape of the groove 83 includes an invertedtriangle or an inverted trapezoid, and the top opening of the groove 83is larger than a bottom opening of the groove 83.

For the inverted trapezoidal groove 83, that is, a certain width d isreserved at the bottom of the groove 83, designing a certain width iseasy to maintain an original deformation of the carbon steel sheetmaterial, so that the carbon steel sheet material has a certain spacefor combination during the bending process, which is conducive tofixation and bending.

The width d of the bottom opening of the groove 83 is in a range of 4-10mm, and the opening in this width range is closest to the deformation ofthe carbon steel sheet material when bending. If the reserved width d isgreater than 10 mm, an excessive gap may be left between the oppositeside walls of the groove 83 after the portion to be bent 80 is bent.

On the cross section perpendicular to the first direction, an includedangle between the opposite side walls of the groove 83 is in a range of20 degrees to 160 degrees. By designing this angle range, photovoltaicframes with different shapes may be manufactured, such as parallelogram,triangle, diamond and other irregular shapes. The photovoltaic frameswith various shapes may be applied to different application scenarios.For example, the photovoltaic frames in the shape of parallelogram,triangle or diamond may be applied to building integrated photovoltaic(BIPV). For example, when the included angle between the opposite sidewalls of the groove 83 is 90 degree, after the portion to be bent 80 isbent, the opposite side walls of the groove 83 are attached to eachother to form an included angle of 90 degree. When the included anglebetween the opposite side walls of the groove 83 is 60 degree, after theportion to be bent 80 is bent, the opposite side walls of the groove 83are attached to each other to form an included angle of 120 degree.

On the cross section perpendicular to the first direction, a differencein the lengths of the opposite side edges of the groove 83 is in a rangeof 0-15 mm. That is, the lengths of the opposite side edges may bedifferent. For example, a length of one side edge is within a cavity ofthe long side edge and a length of the other side edge is within acavity of the short side edge. Since the carbon steel sheet materialshould be fixed in a certain way after bending and molding, such aswelding or riveting, if the length difference between the opposite sideedges exceeds a threshold, a firmness of the finally formed photovoltaicframe may be affected, which is not conducive to the fixing andinstallation of the four edges and is easy to fall apart. The lengthdifference between the opposite side edges being within a thresholdrange of 15 mm may ensure the stability of the finally formedphotovoltaic frame.

Preferably, the lengths of the opposite side edges of the groove 83 areequal. In this way, it is beneficial to improve the aesthetics of thefinally formed photovoltaic frame; and may maintain a uniform stressduring installation, packaging and transportation to avoid deformation.

To sum up, the carbon steel sheet material provided in this embodimenthas the plurality of portions to be bent 80 and the groove 83 on theportion to be bent 80. In this way, by bending the portion to be bent80, an integrated photovoltaic frame may be formed. In addition, thenumber and type of the grooves 83 may be changed according to the sizeand shape of the photovoltaic frame. In this way, an automation degreeof the photovoltaic frame production may be improved, and the productionefficiency may be improved.

A seventh embodiment of the present disclosure provides a photovoltaicframe, and the photovoltaic frame of this embodiment may be made of thecarbon steel sheet material of the sixth embodiment. FIGS. 18-25 areschematic structural diagrams of the photovoltaic frame. Thephotovoltaic frame includes: a plurality of connection portions 30connected in sequence, where the connection portions 30 are used forforming a top support portion 1, a bottom support portion 2, a firstside edge portion 3, a second side edge portion 4 and a transverse edgeportion 5; the top support portion 1, the second side edge portion 4 andthe transverse edge portion 5 enclose a holding slot, and the topsupport portion 1 has a bearing surface facing the holding slot; thebottom support portion 2 is arranged opposite to the top support portion1; the first side edge portion 3, the top support portion 1 and thebottom support portion 2 enclose a closed cavity 20, and the first sideedge portion 3 and the second side edge portion 4 are respectivelylocated on opposite sides of the top support portion 1; a bendingportion 9 which connects two adjacent connection portions 30 andincludes two abutting side surfaces 90; the plurality of the connectionportions 30 connected in sequence and the bending portion 9 beingintegrally formed.

The following will be described in detail with reference to theaccompanying drawings.

FIGS. 21 and 22 are enlarged views of the bending portion of thephotovoltaic frame. Referring to FIG. 21 , the two abutting sidesurfaces 90 of the bending portion 9 are attached to each other. At thistime, a contact area between the two side surfaces 90 is large, and afirmness of the bending portion 9 is good.

Referring to FIG. 22 , the two abutting side surfaces 90 of the bendingportion 9 include: two contact surfaces 901 which are attached to eachother; a connection surface 902 connected with each of the contactsurfaces 901, with a gap between the two opposite connection surfaces902. Accordingly, an adhesive may be filled in the gap to improve thefirmness of the bending portion 9.

For irregular photovoltaic frames, the included angles between theconnection portions 30 are different. If different portions to be bent80 are manufactured for different included angles (refer to FIG. 11 ),the process is more complicated and the cost is high. Therefore, thesame type of the portions to be bent 80 may be manufactured. After theirregular photovoltaic frame is formed, two side surfaces 90 of some ofthe bending portions 9 have gaps, and two side surfaces 90 of some ofthe bending portions 9 are attached to each other. The some of thebending portions 9 having the gaps are filled with the adhesive. In thisway, not only the process may be simplified and the cost may be saved,but also the firmness of the photovoltaic frame may be improved.

FIGS. 18 to 20 are schematic diagrams of three kinds ofthree-dimensional structures of the photovoltaic frame. Referring toFIGS. 18 to 20 , the top support portion 1, the second side edge portion4 and the transverse edge portion 5 enclose the holding slot for placinga photovoltaic panel, and the bearing surface of the top support portion1 supports the photovoltaic panel.

Referring to FIG. 18 , the first side edge portion 3, the top supportportion 1 and the bottom support portion 2 enclose the closed cavity 20,and the closed cavity 20 is an open cavity. The bending portion 9 isarranged between any two adjacent connection portions 30. Thephotovoltaic frame with the open cavity has a simple structure and lowcost.

Each of the connection portions 30 is a single-layer sheet materialstructure, which may simplify the process, save materials and reduce thecost.

Referring to FIGS. 19 and 20 , the connection portion 30 furtherincludes: a third side edge portion 7, which connects the top supportportion 1 and the bottom support portion 2 to enclose an enclosed closedcavity 20, and the bending portion 9 is also arranged between the thirdside edge portion 7 and the top support portion 1 and/or between thefirst side edge portion 3 and the bottom support portion 2.

The enclosed closed cavity 20 may protect a filling inside the enclosedclosed cavity 20 to enhance the strength of the photovoltaic frame. Inaddition, the third side edge portion 7 also has a supporting function,and the photovoltaic frame is not easily deformed.

Further, referring to FIG. 19 , the top support portion 1 is a singlelayer structure. Therefore, consumables are fewer and the structure issimple.

Referring to FIG. 20 , the top support portion 1 is divided into a firstpart and a second part. The first part corresponds to the closed cavity20, and the first part is a single-layer sheet material structure. Thesecond part is outside the closed cavity 20, and the second part is adouble-layer sheet material structure. Therefore, a contact area betweenthe top support portion 1 and the photovoltaic panel is larger and thestability is better.

An included angle between any two adjacent ones of the bottom supportportion 2, the top support portion 1, the first side edge portion 3 andthe third side edge portion 7 is in a range of 20-160 degrees. In thisway, the photovoltaic frame may have various shapes, such asparallelogram, triangle, diamond and other irregular shapes. Thephotovoltaic frame with various shapes may be applied to buildings,which may increase the aesthetics.

At least two adjacent connection portions 30 have an overlapping part,and the overlapping part is a double-layer sheet material structure.Since the photovoltaic frame is integrally formed, for the photovoltaicframe with a complex configuration, the overlapping method may be usedto avoid cutting the sheet material into two pieces, thus reducing theprocess steps. In addition, the double-layer sheet material structuremay also enhance the strength of photovoltaic frame.

One of the top support portion 1, the bottom support portion 2, thefirst side edge portion 3, the second side edge portion 4, or thetransverse edge portion 5 is formed by abutting two connection portions30 at the head and tail. That is, an enclosed area of the photovoltaicframe is formed by abutting the two connection portions 30. In this way,a firmness of the enclosed area may be ensured, and the deformation ofthe photovoltaic frame may be avoided.

Since the first side edge portion 3, the third side edge portion 7 andthe bottom support portion 2 support the whole photovoltaic frame, thephotovoltaic frame is not easily deformed by selecting the connectionportion 30 with a weak bearing function such as the top support portion1, the second side edge portion 4 or the transverse edge portion 5 asthe enclosed area.

The technical solutions for a bending mode of the photovoltaic frameinclude the following specific examples:

For Example one, referring to FIG. 23 , FIG. 23 is a first side view ofthe photovoltaic frame. A start point of bending is on the first sideedge portion 3, and an ending point is on the transverse edge portion 5;or, the start point of the bending is on the transverse edge portion 5and the ending point is on the first side edge portion 3.

The connection portion 30 (refer to FIGS. 18-20 ) corresponding to twodotted lines is the double-layer sheet material structure, and theconnection portion 30 corresponding to one dotted line is thesingle-layer sheet material structure.

In Example one, the third side edge portion 7 and the bottom supportportion 2 are the double-layer sheet material structure, and thephotovoltaic frame has high strength. In addition, the wholephotovoltaic frame is integrally formed by a sheet material, so that themanufacturing time may be shortened and the process difficulty may bereduced.

For Example two, referring to FIG. 24 , FIG. 24 is a second side view ofthe photovoltaic frame. The configuration of the photovoltaic frame inFIG. 24 is the same as the configuration of the photovoltaic frame inFIG. 23 , except that a folding order and the number of layers of theconnection portion 30 (refer to FIGS. 18-20 ) are different.

Specifically, in Example two, the start point of bending is on the firstside edge portion 3, and the end point is on the bottom support portion2; or the start point of bending is on the bottom support portion 2 andthe end point is on the first side edge portion 3.

Correspondingly, the second side edge portion 4 and the transverse edgeportion 5 are the double-layer sheet material structure. Since thelengths of the second side edge portion 4 and the transverse edgeportion 5 are short, even if the second side edge portion 4 and thetransverse edge portion 5 are the double-layer sheet material structure,the photovoltaic frame consumes less sheet material.

For Example three, referring to FIG. 25 , FIG. 25 is the third side viewof the photovoltaic frame. The connection portion 30 further includes afirst connection portion 301 and a second connection portion 302respectively connected with the third side edge portion 7; and the firstconnection portion 301, the third side edge portion 7 and the secondconnection portion 302 enclose a pressing block area, and the bendingportion 9 is also arranged between the first connection portion 301 andthe third side edge portion 7 and/or between the second connectionportion 302 and the third side edge portion 7. The pressing block areamay be used for fixing the photovoltaic frame to prevent thephotovoltaic frame from collapsing.

The first connection portion 301 and the second connection portion 302have a double-layer sheet material structure. Since the first connectionportion 301 and the second connection portion 302 have a function offixing the photovoltaic frame, the first connection portion 301 and thesecond connection portion 302 adopt the double-layer sheet materialstructure to be firmer and prevent the photovoltaic frame fromcollapsing.

The start point of the bending is located at the bottom support portion2, and the end point of the bending is located at the first side edgeportion 3; or the start point of the bending is located at the firstside edge portion 3, and the end point of the bending is located at thebottom support portion 2. In addition, the transverse edge portion 5 andthe second side edge portion 4 also have a double-layer sheet materialstructure.

It should be noted that the specific structure of the photovoltaic frameprovided in this embodiment is not limited to the several examplesprovided above, and that the photovoltaic frame formed by bending thesheet material body along the portion to be bent is within the scope ofthis embodiment.

The photovoltaic frame further includes a reinforcing member (notshown), and the reinforcing member penetrates through the two abuttingside surfaces of the bending portion 9. The reinforcing member includesa welding reinforcing member, a riveting reinforcing member or a mortiseand tenon reinforcing member. The reinforcing member may strengthen thefirmness of the bending portion 9 and avoid the deformation of thephotovoltaic frame.

To sum up, the photovoltaic frame provided in this embodiment has theconnection portions 30 connected in sequence and the bending portions 9connecting the adjacent connection portions 30, and the connectionportions 30 and the bending portions 9 are integrally formed, so thatthe production efficiency of the photovoltaic frame may be improved andthe production cost may be reduced. In addition, the overall strengthand firmness of the photovoltaic frame may be improved by arranging someof the connection portions 30 with the double-layer structure,reinforcing the bending portion 9 and filling the closed cavity 20.

An eighth embodiment of the present disclosure provides a method formanufacturing a photovoltaic frame, and the specific process as shown inFIG. 26 includes:

In S801, a carbon steel sheet material is provided.

Specifically, a carbon content in the carbon steel sheet material inthis embodiment is in a range of 0.04% to 0.25%. Since too low carboncontent in the carbon steel sheet material may lead to a weak strengthof the carbon steel sheet material, which is difficult to meet thestructural strength requirements of the photovoltaic frame. Theexcessive carbon content in the carbon steel sheet material may lead toan increase in a salt spray corrosion rate of the carbon steel sheetmaterial, which is difficult to meet the requirement of a warrantyperiod of the photovoltaic frame. By using the carbon steel sheetmaterial with this carbon content range to manufacture the photovoltaicframe, the strength of the photovoltaic frame may meet the designrequirements without affecting the warranty period of the photovoltaicframe.

The strength of the carbon steel sheet material is in a range of 200 MPato 600 MPa. The strength of the carbon steel sheet material represents amechanical property of the carbon steel sheet material against fractureand excessive deformation. By adopting the carbon steel sheet materialwith such strength range, the manufactured photovoltaic frame may meetthe design requirements and is not easy to deform under an action of anexternal force, which improves the stability of the photovoltaic frame.

A percentage of breaking elongation of the carbon steel sheet materialis within a range of 15% to 36%. When the carbon steel sheet material issubjected to the external force to break, a ratio of an elongationlength after stretching to a length before stretching is the percentageof breaking elongation of the carbon steel sheet material. By adoptingthe carbon steel sheet material with such percentage of breakingelongation range, the manufactured photovoltaic frame may meet thedesign requirements, has a certain deformation capability, and does notbreak after a slight deformation, which improves the stability of thephotovoltaic frame.

In S802, the photovoltaic frame is formed by processing and molding thecarbon steel sheet material.

Specifically, the photovoltaic frame includes: a top support portion, abottom support portion, a first side edge portion, a second side edgeportion and a transverse edge portion, where the top support portion,the second side edge portion, and the transverse edge portion enclose aholding slot, and the top support portion has a bearing surface facingthe holding slot, the bottom support portion is arranged opposite to thetop support portion, and the transverse edge portion is located one sideof the top support portion away from the bottom support portion; thefirst side edge portion connects the top support portion and the bottomsupport portion.

It can be understood that the photovoltaic frame in this embodiment isnot limited to the above-mentioned structure, but may also include otherstructures, which have been described in detail in the foregoingembodiments, and are not be described here to avoid repetition.

It is worth mentioning that, in this embodiment, the carbon steel sheetmaterial is molded after processing. Specifically, a calendaring andcold roll forming process is adopted for the carbon steel sheet materialto form the photovoltaic frame. In this way, the method formanufacturing the photovoltaic frame is simple, the cost is low, andthere is no pollution in the manufacturing process.

More preferably, the carbon steel sheet material of this embodimentincludes a plurality of portions to be bent. The carbon steel sheetmaterial includes a top surface and a bottom surface which areoppositely arranged. The portions to be bent have at least one grooverecessed from the top surface toward the bottom surface. An extendingdirection of each of the portions to be bent is a first direction, andan extending direction of a top opening of the groove is the same as thefirst direction. The processing includes: bending the portion to be bentto form the photovoltaic frame. Through an arrangement of thisstructure, the carbon steel sheet material is easier to bend, thusreducing the difficulty of manufacturing the photovoltaic frame.

FIG. 27 is a schematic structural diagram corresponding to each step ofthe manufacturing method.

Referring to FIG. 27(A), the sheet material of the first embodiment isprovided.

The method for manufacturing the sheet material includes: designing thenumber of the portions to be bent required by a sheet material body anda distance between adjacent portions to be bent according to a requiredlayout of the photovoltaic frame. Further, the shape and number ofgrooves on the portion to be bent are designed. The sheet material bodyis cut by laser to form the portion to be bent and the groove on theportion to be bent. After forming the portion to be bent, the sheetmaterial is cut off according to a required assembly size. In this way,the sheet material in the first embodiment may be manufactured. Theremaining sheet material body may still form another photovoltaic framein succession.

Referring to FIGS. 27(B)-(D), a plurality of connection portions andbending portions connected in sequence are formed by bending along theportions to be bent on the sheet material. The bending portion connectstwo adjacent connection portions, and the bending portion includes twoabutting side surfaces. The plurality of the connection portions andbending portions connected in sequence are integrally formed.

The bending mode may be a stamping. In addition, before the bending, theportion to be bent may also be heated to improve a toughness of theportion to be bent.

After the bending, the bending portion is reinforced, such as by welding(resistance welding and argon arc welding may be selected), riveting,mortise and tenon, and other connection assembly scheme, so as to avoidthe photovoltaic frame loosing.

In addition, a cavity may also be filled with an organic material suchas a polyurethane foam and extruded to enhance the strength of the sheetmaterial. It is worth noting that a polyurethane foaming temperatureshould be met in this step. When the temperature is low, an ambienttemperature may be raised by means of illumination, hot plate heating,etc., so that the polyurethane meets the foaming requirements.

To sum up, the method for manufacturing the photovoltaic frame providedin this embodiment adopts an integrated cutting method, and the cutsheet material is bent to form the photovoltaic frame. Therefore, it isbeneficial to improve productivity efficiency and realize a fullautomation of photovoltaic frame production.

Correspondingly, an embodiment of the present disclosure furtherprovides a photovoltaic module, which includes a stacked structure andthe photovoltaic frame provided in any of the above embodiments, wherethe stacked structure includes a panel, a first adhesive film, a cellpiece, a second adhesive film and a backplane which are sequentiallystacked. A bearing surface of the photovoltaic frame bears the stackedstructure.

FIG. 28 is a schematic diagram of a partial three-dimensional structureof the photovoltaic module. The photovoltaic module includes aphotovoltaic frame 102 and a stacked structure 101. A holding slot 10 ofthe photovoltaic frame 102 holds the stacked structure 101, so that thestacked structure 101 is stably fixed with the photovoltaic frame 102,thereby improving the stability of the photovoltaic module.

The photovoltaic module may further include a filling portion 10 forfilling a gap area between the stacked structure 101 and the holdingslot 10. In addition, the filling portion 10 may also fill other areasof the photovoltaic frame, which may further improve the stability ofthe photovoltaic frame.

FIG. 29 is a sectional structural diagram of the stacked structure inFIG. 28 . The stacked structure 101 includes a panel 101A, a firstadhesive film 101B, a cell piece 101C, a second adhesive film 101D and abackplane 101E which are stacked in sequence, where the panel 101A islocated on a light receiving surface of the cell piece 101C, andadjacent cell pieces 101 are overlapped. The backplane 101E may be aglass or an organic backplane.

FIG. 30 is another sectional structural diagram of the stacked structurein FIG. 28 . The adjacent cell pieces 101C are not overlapped and anelectrical connection may be realized by a ribbon 101F.

In one example, the stacked structure 101 may be a single glassassembly, that is, the panel 101A is the glass, and the backplane 101Emay be an organic backplane or a non-transparent backplane.

In another example, the stacked structure 101 may also be a double glassassembly, that is, both the panel 101A and the back panel 101E are theglass.

In yet another example, the panel 101A includes a long side edge and ashort side edge adjacent to each other, where a length of the long sideedge is greater than or equal to 2 m, and a length of the short sideedge is greater than or equal to 1 m. The stacked structure 101 may bedefined as a large-size assembly.

Since the transparent backplane assembly and the large-size assemblyhave a limited structural strength and are easy to be damaged under anexternal force, the photovoltaic frame provided in the foregoingembodiments is combined with the stacked structure 101 to form thephotovoltaic assembly, so that when the photovoltaic assembly has thebackplane or panel with a poor structural strength, the photovoltaicframe may play a good supporting role, avoiding the backplane or thepanel being damaged under the external force, thereby improving thereliability of the photovoltaic assembly.

Those skilled in the art should appreciate that the aforementionedembodiments are specific embodiments for implementing the presentdisclosure. In practice, however, various changes may be made in theforms and details of the specific embodiments without departing from thespirit and scope of the present disclosure.

What is claimed is:
 1. A photovoltaic frame, comprising: a top supportportion, a bottom support portion, arranged opposite to the top supportportion; a first side edge portion, configured to connect the topsupport portion and the bottom support portion; a transverse edgeportion, located at one side of the top support portion away from thebottom support portion; a second side edge portion, configured toconnect the top support portion and the transverse edge portion;wherein: the top support portion, the second side edge portion and thetransverse edge portion form a holding slot configured to hold a stackedstructure; the top support portion has a bearing surface facing theholding slot; the second side edge portion has a first inner surface anda first outer surface which are opposite to each other, and the firstinner surface being a part of an inner wall of the holding slot; thetransverse edge portion has a second inner surface and a second outersurface which are opposite to each other, and the second inner surfacefacing the top support portion; the top support portion has a thirdinner surface and a third outer surface which are opposite to eachother, and the third inner surface facing the transverse edge portion;the bottom support portion has an upper surface and a lower surfacewhich are opposite to each other; and the first side edge portion has aleft surface and a right surface which are opposite to each other; and aweather-resistant protective layer, covering at least one of the firstouter surface, the second outer surface, the third outer surface, theupper surface, the lower surface, and the left and right surfaces of thefirst side edge portion; wherein the inner wall of the holding slotincludes the first inner surface, the second inner surface and the thirdinner surface, and the inner wall is not covered with theweather-resistant protective layer.
 2. The photovoltaic frame accordingto claim 1, further comprising a third side edge portion, configured toconnect the top support portion and the bottom support portion; thethird side edge portion having a left surface and a right surface whichare opposite to each other, the right surface of the third side edgeportion facing the first side edge portion; and the weather-resistantprotective layer further covering at least one of the left and rightsurfaces of the third side edge portion.
 3. The photovoltaic frameaccording to claim 2, wherein: the third side edge portion, the firstside edge portion, the top support portion and the bottom supportportion are configured to form a closed cavity; the closed cavity has aninner wall surface including the right surface of the third side edgeportion, the third outer surface of the top support portion, the leftsurface of the first side edge portion and the upper surface of thebottom support portion; and the weather-resistant protective layer isfurther configured to cover at least part of the inner wall surface ofthe closed cavity.
 4. The photovoltaic frame according to claim 3,wherein the weather-resistant protective layer is configured to coverthe right surface of the third side edge portion and the left surface ofthe first side edge portion.
 5. The photovoltaic frame according toclaim 2, wherein the right surface of the third side edge portion, thethird outer surface of the top support portion, the left surface of thefirst side edge portion and the upper surface of the bottom supportportion are not covered with the weather-resistant protective layer. 6.The photovoltaic frame according to claim 1, wherein the third outersurface of the top support portion, the left surface of the first sideedge portion and the upper surface of the bottom support portion are notcovered with the weather-resistant protective layer.
 7. The photovoltaicframe according to claim 1, wherein the first outer surface, the secondouter surface and the third outer surface are covered with theweather-resistant protective layer.
 8. The photovoltaic frame accordingto claim 1, wherein the weather-resistant protective layer includes analloy plating layer or an organic film layer.
 9. The photovoltaic frameaccording to claim 1, wherein a grammage of the weather-resistantprotective layer is in a range of 20 g/m² to 500 g/m².
 10. Aphotovoltaic module, comprising a stacked structure and a photovoltaicframe; the photovoltaic frame including: a top support portion, a bottomsupport portion, arranged opposite to the top support portion; a firstside edge portion, configured to connect the top support portion and thebottom support portion; a transverse edge portion, located at one sideof the top support portion away from the bottom support portion; asecond side edge portion, configured to connect the top support portionand the transverse edge portion; wherein: the top support portion, thesecond side edge portion and the transverse edge portion are configuredto form a holding slot configured to hold a stacked structure; the topsupport portion has a bearing surface facing the holding slot; thesecond side edge portion has a first inner surface and a first outersurface which are opposite to each other, and the first inner surfacebeing a part of an inner wall of the holding slot; the transverse edgeportion has a second inner surface and a second outer surface which areopposite to each other, and the second inner surface facing the topsupport portion; the top support portion has a third inner surface and athird outer surface which are opposite to each other, and the thirdinner surface facing the transverse edge portion; the bottom supportportion has an upper surface and a lower surface which are opposite toeach other; and the first side edge portion has a left surface and aright surface which are opposite to each other; and a weather-resistantprotective layer, covering at least one of the first outer surface, thesecond outer surface, the third outer surface, the upper surface, thelower surface, and the left and right surfaces of the first side edgeportion; wherein the inner wall of the holding slot includes the firstinner surface, the second inner surface and the third inner surface, andthe inner wall is not covered with the weather-resistant protectivelayer; and wherein the stacked structure comprises a panel, a firstadhesive film, a cell piece, a second adhesive film and a backplane thatare sequentially stacked.
 11. The photovoltaic module according to claim10, wherein the photovoltaic module further includes a filling portionfor filling a gap area between the stacked structure and the holdingslot.
 12. The photovoltaic module according to claim 10, thephotovoltaic frame further includes a third side edge portion,configured to connect the top support portion and the bottom supportportion; the third side edge portion having a left surface and a rightsurface which are opposite to each other, the right surface of the thirdside edge portion facing the first side edge portion; and theweather-resistant protective layer further covering at least one of theleft and right surfaces of the third side edge portion.
 13. Thephotovoltaic module according to claim 12, wherein: the third side edgeportion, the first side edge portion, the top support portion and thebottom support portion are configured to form a closed cavity; theclosed cavity has an inner wall surface including the right surface ofthe third side edge portion, the third outer surface of the top supportportion, the left surface of the first side edge portion and the uppersurface of the bottom support portion; and the weather-resistantprotective layer is further configured to cover at least part of theinner wall surface of the closed cavity.
 14. The photovoltaic moduleaccording to claim 13, wherein the weather-resistant protective layer isconfigured to cover the right surface of the third side edge portion andthe left surface of the first side edge portion.
 15. The photovoltaicmodule according to claim 12, wherein the right surface of the thirdside edge portion, the third outer surface of the top support portion,the left surface of the first side edge portion and the upper surface ofthe bottom support portion are not covered with the weather-resistantprotective layer.
 16. The photovoltaic module according to claim 10,wherein the third outer surface of the top support portion, the leftsurface of the first side edge portion and the upper surface of thebottom support portion are not covered with the weather-resistantprotective layer.
 17. The photovoltaic module according to claim 10,wherein the first outer surface, the second outer surface and the thirdouter surface are covered with the weather-resistant protective layer.18. The photovoltaic module according to claim 10, wherein a grammage ofthe weather-resistant protective layer is in a range of 20 g/m² to 500g/m².